I use the eSUN PLA-Matte with an A1-mini.
I started using it with a modified BambuLab PLA-Matte preset (lower print speed and fan always at 100% as recommended by eSun). This worked okay but occasionally led to stringing.
I tried a bit - always the same result - until I simply used the BambuLab PLA-Matte preset without modification. Works great, prints quickly in good quality and very rarely goes wrong. I also generally make sure that the PLA mat is well dried.
Perhaps this will also help with SUNLU, ah and of course a new dynamic calibration after a longer storage period.