Brief Description of Bug

After switching from TSM window to an Auctionator tab, the frame gets broken and nothing but a reload fixes it.

Sometimes it's this element, sometimes one of the buttons but one of them always looks like this.
This behavior appeared with TSM v4.12.38 and is still present with 4.12.39, but not 4.12.37. TSM frames and all functionality are intact.
Auctionator version doesn't seem to impact it, I've tried to roll back several versions but it didn't help. Currently using v10.1.5-12-g914353a.
I know this shouldn't be an issue with this addon but TSM will obviously not fix it since theirs "works as intended" and I really don't want to be stuck using an old version of it for years again, so... I'm hoping there's something that can be done about this on your end.

Steps to Reproduce

1. Open AH with TSM window (it should be the first one appearing when interacting with the NPC, so switching to TSM window and reopening the AH might be necessary)
2. Switch to default UI / Auctionator
3. Observe broken frame / button

Loaded Addons

Auctionator
BugGrabber
BugSack
TradeskillMaster

Back Trace (LUA Error Output)

There is no LUA error.

Yes it's changed in TSM v4.12.38.
Reopening the AH doesn't fix this, nothing does except reload sadly.

The issue arises when Auctionator isn't loaded, and is related to buttons autosizing on creation:

This mini addon will trigger the issue with Auctionator disabled on a first load in the client. AHTab-b491886.zip

So what you're saying is if I were to use this addon, it would "mask" the issue and Auctionator frames would work?

No, it won't fix the issue, but it demonstrates that the issue isn't specific to Auctionator, another add-on adding tabs to the ah would be affected too

I've done some testing, and this is a TSM bug and is probably related to how the Auction House frame is hidden by TSM. Presumably that changed recently which has caused this error.

What you can do to work around the problem is close and reopen the AH after swapping away from the TSM view.

The issue arises when Auctionator isn't loaded, and is related to buttons autosizing on creation:

This mini addon will trigger the issue with Auctionator disabled on a first load in the client.
AHTab-b491886.zip

Try this build:
Auctionator-10.1.5-14-g858220b.zip

Fixed in the latest alphas, available from Curseforge or Wago when the build finishes processing.

It works!
You are awesome, thank you!