Smush Image does not work.

how to configure wp smush pro to convert uploaded PNG right to JPG
not it looks i have to "resmush" PNG image to make it work

that when i firstly upload picture and set it as featured picture in the post, then it smush the picture but it preserves the format of PNG
i can then publish post and i see that featured picture is in PNG format
then i have to go to post, click on featured picture (to see images dialog) and when i there hit "resmush" then it do the work and converts png to jpg

i now also tried to upload small png like 144x 100 PNG
Sent from App, via Chrome, 3m ago
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and it is still doing this smushing but it should be like in a few seconds done, it still has this message smushing in progress

See this screenshot:
https://monosnap.com/file/8BZEaAtErnIp8qteb1zUYBhhPye5yP