Tools Panel keep resetting to default!

Same issue here. Between the crashing and constant resetting of the tools, I'm wondering why I'm even wasting my money anymore. Especially with these generic answers I see from Adobe Support. Bad enough everytime I try to send the error report after it crashes, I receive no response or a response that tells me they have no solution, but to see it typed in by a person on the forum is extremely disappointing with what we pay to have it. Get your act together Adobe. Fix the problems please.

Mine also keeps resetting, sometimes almost daily. All we need is a button that lets us "lock" our customization. Would that really be so hard to do?

I have five tools that I use the most, one of which is Prepare Form, and is constantly dropped when I lose my customization. Please fix the issue!

Same here. My Adobe has been like that for a couple of weeks now and it is driving me crazy! Nobody else in my department seems to have the issue and IT didn't find a solution.

I tried resetting the application preferences now as recomended by MeenakshiNegi. Hoping this will help! (*fingerscrossed*)

Same issue, been happening for over a year now. Seems to reset every few weeks or so. I would think its due to when updates are pushed out possibly 

Hello Adobe, I have the same issue. I customize my quick tool bar and my customization randomly disappears... My computer is managed by my employer, so at first I thought it was because of that. The IT told me that the problem is on your side. It is frustrating to have to put it back again every day and sometimes multiple times a day. It seems to happen after the computer went to sleep or after a restart. I hope you can fix this !!

This is the version I am using but it’s been doing that for a year...

Same issue here. 

I'm wondering, could it have something to do with the fact that the IT department of my company is running all updates?

Also having this problem, it's driving me batty. So many I don't use. I've been able to add the forms app, and it's stays there. I remove the ones I don't use, but they keep coming back. Very frustrating. All of the solutions I find say to go to Edit > Preferences > Documents and there should be a check box to lock the tool pane to last settings. However, that check box doesn't exist for me.

Same issue that EVERYONE else here has listed.  I only use a handful of tools in Acrobat but two of those VERY frequently and of course the one i use ALL the time is the one not included in the default list.  The only difference, mine used to be fine for months or weeks but the frequency has been increasing.

Is it tied to updating the app (via Creative Cloud)?  That sometimes triggers the issue but is not always the case.  Sometimes the tools just randomly reset in the middle of my work day.  (I don't leave the app running so i open and close it multiple times a day.)

Super frustrating.  (running Windows 10)

FYI! I am also having this issue and have been having this issue for a long while now (like years)! I have tried searching for help multiple times, and this is the first time someone else finally posted something about it... Which means I AM NOT ALONE. Adobe your excuse of "trying to replicate the behavior" is completely ridiculous...
You can replicate it, by having a specific set of tools that you use other than default on a daily basis and then experience losing that comfort and having to reset all your favorite things back multiple times at random! Why give us the power to customize it, if you are just going to default it back at random??? Understand this is an issue, quit making excuses and fix it please!
Thanks