Greetings and Welcome to the Forum.
You haven't given us much to go on. The definition of "signal drop" could be quite varied. If you mean you see the indicator displaying a low reading then yes, I've seen it on mine and it's meaningless as I still have great call quality and no dropped calls.
Signal strength indicators (in general no matter the brand of phone) are just that. And indicator, not a gauge . They are not expected to be perfectly accurate and in fact in many cases I wish the manufacturers wouldn't even use them, since when they read low... people worry and you can't do anything about it anyway.
For the most part you either have a signal or you don't. Yes the signal strength tends to vary a bit, but there are many phones that always show low readings while operating just fine.
Mine is constantly low, as compared to my other Androids, and it's the best of them all.