Could do better but not much better
It looks like all the major players in the Password Manager area have done a fair amount of work to try and protect content in memory and scrub after use but need to make small changes to slightly improve it this. At the same time, with your machine already being accessible some of the changes will make no difference anyway.
Better to fix them than not fixing them but in the big picture, it's nothing we didn't know already. Code has been created before to extract and dump the content of unencrypted password managers to screen or file and it will always be possible one way or the other. Even if only one entry is decrypted as it's used, that means the master password or secret is somewhere in memory in some form, just waiting for someone to work out a way to reverse it. Or whatever is watching on that machine waits for every password to be used.
Keepass came out well in their summary table, so I get to feel smug running that on Linux :)