Yeah I think the issue was the man he was marking drifted inside the field, so he followed him in then switched off once it went over his head thinking the danger was over.
Bryan to be fair made up a lot of ground from the LWB position arriving at the back post, somebody else should have tracked him. At the same time though he does seem to get sucked in too close to the centre backs on crosses, this isn't the first time a ball has dropped over him to the back post to somebody free.
Similar to the Leicester goal, crosses from the left to the right seem to be our weakness.
I actually thought he was really good in the first half in an attacking sense, his link up play building from back to front has really improved.