@magnusvhendin Just a couple quick, half baked thoughts: Are you using uBlock in default "luser mode" or one of the "expert modes". If the latter you can get a better picture of what it may be blocking. Also, turn on it's logging.
Shooting from the hip: where are these these various templates and dependencies being served up from? Recent versions of uBlock are tuned to block "CNAME Abuse", which is rampant, particularly among certain analytics and CDN providers looking to masquerade their 3rd party stuff as being served under the same origin domain.
And finally, @julian, iirc, uBlock (Origin) is the most widely used blocker (ad blocker would be a misnomer since it offers controls for much more that just ads). Hence, I would think it would be desirable to ensure stuff jfw with its default settings.
Privacy is a constant arms race 'twixt good and evil. Good to be on the right side of that one. Especially as more and more media attention is cluing in the formerly clueless... A day will arrive when all the kool kids on the block are running stuff like uBlock. Maybe it is already here. Only a short step from there to being embraced by the unwashed masses....
P.S.; And yes, I get the irony that many (most?) of these same media outfits being some of the worst of the worst offenders.