Yes, I have in the last few years had to replace all my three, one failed over winter. The other road wheel was cracking about 7months later, plus the spare was change for peace of mind . The two road wheels had tyre changes about three years before things started to go wrong, the spare was about ten years old never touched. I have my doubts the valve on one road wheel was changed, I had three differing designs one on each wheel.
Mine are cold inflated to 65 psi but in use rise much higher.
My chosen tyre dealer I went to get the first valve changed, said these rubber ones are rated to 65 psi, ought to be okay, but he would not use them personally in a caravan at these pressure levels. He fitted a composite brass and rubber stem much like this one;
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I would comment that I have used Tyrepal caps and both road wheels had rather lanky stems, the spare and the new replacement being shorter.