Mozilla Thunderbird Taskbar Icon Issue

I am on Win10 and am currently using Moz/Thunderbird 102.6.1 (32-Bit). I am having an issue that I have had for a while now, but thought the next update would always solve it. About every month or so my Thunderbird Taskbar icon which I have pinned and looks like:

eventually ends up not being recognized by WIndows, for example:

Is this a known issue? Any reason this is happening? It usually happens right after I close the application to go on to do something else. Firefox may also be open at the time, so I am not sure that would have anything to do with it.