IMDb regularly erases my credits / Unable to verify credit

I'm a CG compositor with ten years of experience, I work on a lot of films and TV series and my name is listed in the credits of each project. But IMDb regularly erases some of my credits and writes "Unable to verify credit", when i try to add them again. However, I have not noticed any system in this process: credits are deleted randomly, and I am also asked to prove my participation in the project randomly. Sometimes it is required, sometimes not. So I have to check my page regularly and spend a day or two restoring the full list of projects, it is incredibly annoying! Moreover, some credits are not added even when I provide a screenshot of the credits with my participation. How can I solve this problem? The following projects are currently deleted and cannot be restored: https://www.imdb.com/title/tt31835125 https://www.imdb.com/title/tt30425001 https://www.imdb.com/title/tt28768298 https://www.imdb.com/title/tt26446266 https://www.imdb.com/title/tt28236082 https://www.imdb.com/title/tt27495190 https://www.imdb.com/title/tt23791244 but in a month there will be another seven projects, I'm sure. Can you help me with this? I would like to do my work without being distracted by this every now and then(