bashwelcometweak.sh affecting sftp & network connection. pi4 & pi3

[2Play]

Good day to all.
I have been testing clean installs on pi4 and pi3 and the last couple days after updating to latest script and apply bashwelcometweak.sh script

pi4 becomes "slow" and "clogged/unresponsive"
the ftp connections over sftp and especially with sudo -s /usr/lib/sftp-server
wont connect, or if connected it will keep disconnecting and in general network connection becomes messed.
If removed on pi3 seems to fix it. But on pi4 not.

Above take place with manual install guide.

I ve posted this issue but was requested to post here. Just wanted bring to your attention

[mitu]

I don't see how the bashwelcometweak would affect the network (ssh) connection - it's a simple bash function that is executed after an interactive login (i.e. it doesn't affect sftp).

How are you applying the script ?