Coming and Going of Special Interests

Does anyone else notice special interests coming and going? This might be connected to ADHD too but idk. Like for example I've had a near lifelong Batman special interest but like...its not constant if that makes sense? I'll be very strongly fixated on Batman for a few years and then I'll have like a year or two where I don't think about it as much and in that time I can clear think about missing it and wishing I could engage in it like I used to but just can't reach it, and then something will cause it to come back. Is that common? Is there I way I can like...prevent the loss of sp-ins? I hate the feeling of abandoning them but I just can't reach them after a while and if possible I think I'd want to avoid that