vu+ usb turbo dvb-c/t/t2 hybrid tuner on Vu+ solo 4k

Have a look at your signal strength/quality.
Are you using it cable (dvb-c) or terrestrial (dvb-t/t2)?
If it is for terrestrial, you may have a problem with your aerial installation or cabling/rf plugs etc.
Your signal strength/quality should tell you this (if it is poor)

Do you get the Freezing and glitching on FTA cable channels as this would point to a signal/cable problem, could even be too much signal overloading the Tuner

As i stated previously sounds like an issue with either cabling/Connectors or you need to add an attenuator or a forward path type to solve the problem, My Onboard Dual DVB-C/T/T2 tuner on the 4K has zero problems although i do have the equipment and parts to remedy any problems for myself

What do you mean by splitting the signal?

I could be wrong but I always thought splitting a digital signal was not
very successful. Try taking the splitter out and run the cable ditect to
each box in turn and see if that stops the freezing and glitching, it's
worth a try.

Next time I will read the post more carefully, hope you get it sorted.

you have found the problem yourself when you take a direct feed into the DVB-C tuner and omit the splitter as you say your FTA channels are fine with no sign of freezing or breakup which means you need some form of cable booster.

As soon as you split the signal you are taking away XX.db out of the incoming signal which the tuner cannot handle, Hope your not using a full frequency splitter ie: 5-2400mhz as these also can create problems

Ideally if you do not have a spare official VM splitter then ebay Tratec 2 way splitter for a 5-1000mhz one.

Also log into the VM superhub advanced section and post a screenshot of your power levels