Instable history

I am noticing that randomly the dividend payments of the last one or two years are missing on both the Yahoo Finance site and the requested `history` data by `yahooquery`. As a result the adjusted columns like `adjclose` can be wrong. Especially calculating the performance of stocks during several years can deviate a lot. At this moment I can't find any pattern. At this moment I consider it to be a random problem caused by Yahoo. I tried several different locations of Yahoo Finance (Germany, France, USA,....) at different times for different stocks.

To show what is happening I am using a graph of the performance of Apple. Notice the missing dividend payments in the recent years.

Does anyone know how to deal with this problem? How can I avoid this behavior? How can I detect this problem?