Curious as to if anyone has had this issue

When I am getting a handjob/blowjob as this being the main event I have no problem maintaining an erection and cumming. But when it is done as foreplay and I know sex is going to occur I either lose my erection then or when it comes to putting on the condom. Any advice would be much appreciated

I run into the same issue. It’s all the foreplay. I can keep it for little bit.

Normal! Condoms suck-they are work to put on and take you out of the mood when trying to put on. Plus, they desensitize the feel.
Hand jobs and BJ , when done right have a much tighter feel and overall cover more of your penis this feels better