Gramps

I have been using Gramps for years (with Windows and Linux) and I enjoy its features a lot: its windows are more independant than windows-born softwares, the filters give a lot of possibilities and the soft runs quickly on my computers. The biggest trouble is that Gramps (5.0.1-1) crashes at almost every session (I am using it in Windows, at the moment, adding people, notes and pictures) . My file is 8500 people, not a huge one. I would like to use Gramps as my main genealogy program, it is the one I prefer. I use also Legacy Family Tree and sometimes Ancestris (no big problems with gedcom export / import with Gramps). Sure, for me the only trouble with Gramps are those "unattended errors" that happen several times a day, sometimes several time a session. I must add that I tried downgrading to Gramps 4.28 on Linux (using the repository version instead of v. 5) but I had many crashes too so I reinstalled v. 5. I do not know anything in programing but I noticed the errors always come from some *.py and the last line in the error report is always "sqlite3.OperationalError: cannot start a transaction within a transaction". My OS: Linux MATE 18.04, Windows 10, up to date.