Hi, yeah I've had one (luckily only one so far) bleed a reasonable amount, but it worked OK afterwards. Abbott suggested that was because the central part (where the needle goes through to insert the filament) was able to clear and have air to it. They thought sensors which bled so much as to block/clog that wouldn't be as accurate or even stop working completely. I guess it is a bit of a lottery but if it helps I've only had one bleed in 1 1/2 years of libre use.
I would recommend having a spare sensor at home just in case one needs replacing for any reason, so you don't have to wait. I'm currently waiting for my sensor prescription which Pharmacy2U says is 5 days late because they have a supply issue, for example. Luckily 3 weeks ahead with my prescription request vs need of the sensors so should all be ok!