Hello andrucrypt,

i reduced the mem clock to 945 MHz. The first calculation do the "result rejected, low difficulty". The probleme stay for me (radeon software 20.10.35.02 - old design). If you have time (in future), it would be nice that your software works well for me. Thanks. 

No overclock.  It's running at 1040 clock and 1500 memory.  I'm using 20.4.2