Question about WH - 443883

I bought this lamp Philips 14W, A+, R7s at Bau und Hobby, but I had to have it replaced 1x already, because it worked worse and worse and after less than half a year it could no longer be used reasonably in the kitchen lamp. Everything worked perfectly for the first 3 months. Then there were first delays of several seconds when switching on and at some point it needed to be pressed several times until on. Later, it didn't work for days or it didn't turn on for 30min after pressing it - it became the exception that it worked. The lamp was neither close to 15,000 hours of use nor 50,000 times switching... The new lamp only worked properly again for about 2 months and now I am already noticing the first switch-on delays in the range of seconds... Am I the only one with this problem or are there others who observe similar things? The kitchen lamp was previously operated with halogen lamps for years and everything worked perfectly, as far as I can tell.