[Orb Vallis minind nodes not spawning]

Did you Solo and have Rising Tide quest active? Set to Public and mining spots should work again. 

[Buying Grendel parts doesn't work]

You don't get the Grendel parts, the things you purchased actually unlock Grendel part rewarding missions. You need to complete the missions to get the parts.

[Warframe Builder]

ETA on when Fireball Frenzy (updated), Immolated Radiance, Healing Flame, Exothermic, Tesla Bank, Photon Repeater and Repelling Bastille (updated) get added?

[Rising Tide PoE and OV mining spots disappear when solo]

When solo mining for Rising Tide stuff on PoE or OV, there's a chance that at some point mining spots disappear from whole map.

[Weapon snatched to Oblivion by Drahk Masters]

This problem exists for years now. This isn't the only thread about this issue; there are dozens. Not a word from DE about resolving this.

[Matchmaking based on ping bug and suggestion]

Known issue for billions of years. And I've never heard DE mention about resolving this. But I do notice "get better internet" from time to time.

[Warframe Builder]

Found a typo:
Ember's "IMMOLATION" has "DAMAGE REDUCTION (MIN)" twice. I presume the second is supposed to have "MAX" at the end instead.

Also, can't wait until Ember's and Vaub's new Augments get added too. 

[Account wide ability bug]

If all above fails, then do Verify and Optimize in game launcher.

[Lost all rewards in Arbitration after a host migration]

Sadly there are no mechanisms against bad host migration. Or packet loss. Or crashes. Everything is bare minimum. As they say, "minimum viable product". Better take a break from WF before WF breaks you too.

[Drahk Master Erasing Weapons]

Do you know what's more fun? 1. When the bug deletes both of your weapons and your melee happens to suck. 2. This bug is ignored by DE for at least 1 year now.

[Warframe Builder]

I discovered an anomaly under Sigma & Octantis' Search builds:
click on build named "Sigma and Octantis - 1", you get thrown to main page.

[login try to downlaod msi file and cant get game]

Warframe is Open Beta Forever(™) so you are installing  the correct thing.

[3 Years and 1000 Sorties]

So a Legendary Core every ~338 Sorties. Now we know the secret number.

[Matchmaking ping limit: Broken]

One problem would still remain IF DE would decide to increase latency check time: packet loss.
Some people may have low ping, but that doesn't guarantee packet loss free connection (in case of non-gamin internet service, wireless). Even a loss of single packet is a gamble that something may become fatally broken until end of mission.
In that case, DE also needs to research safety measures against packet loss.
But it's safe to presume that this issue will never be looked at and we'll continue getting "get better internet".

[Weapons disappearing vs drahk master]

I remember one of my missions, where opponents deleted my primary and my secondary, nobody in my squad could see where my weapons dropped. This is a 1+ year old bug. 
There's also one annoyance regarding weapon robbery: sometimes they yeet your weapon to an inaccessible location, like into the air, literally, just stuck in mid air...

[tranq rifle not working]

There are several threads about bad capturing mechanics in general and also a thread about projectiles flying through instead of hitting. An OB update broke the latter. Sadly I've never seen a response from DE in any of those threads... So maybe they already know and perhaps fix will come in next update. Or the fix is too difficult and you'll get to enjoy it for several months, and hopefully not years.

[Completely unplayable mission on PC]

When there's even a tiny packet loss between client and host player there is a gamble for all sorts of nasty glitches regarding operator, warframe and mission script to happen.
Sadly WF lacks mechanism for adapting with poor connectivity between peers...

[ESO Forcing You Into Next Round if You Go Into Void Mode]

Actually this bug was present pre OB. But yeah, happened to me too many times.

[(PC) The Old Blood Bug Reporting]

I went fishing on PoE, I noticed that after every failed catch my spear refuses to get thrown for few seconds. Is spear cool down intended feature? I find it immersion breaking.

[Sawgaw: fix the damn birds already...]

I really really would like to see DE staff perfect capture all animals and all of their variants. Dare they only say that we aren't supposed to do that/all works as intended.

[(PC) The Old Blood Bug Reporting]

I'll leave this here, maybe it will be cherry picked for fix...

 

[Quick Thinking insta-kills operator when at 2 HP]

OOOOH, I haven't seen this report before, so I assumed... But anyway, report where DE can see it, so they won't miss the report like I did.

[Quick Thinking insta-kills operator when at 2 HP]

OB update related bugs should be here instead:

 

[Adaptation mod is bugged after old blood]

Report should be here instead:

 

[Bug reports falling on deaf ears?]

Tiny team; no resources. Just report, wait for next hotfix and repeat report until fixed. Depending on complexity of error, it may take less than a day or may never be fixed.