yup, right until amazon bricks your firestick - which they seem to have been threatening to do for some time, but not achieved.
Kodi is just poor and there is no escaping a fact of these services. The cheaper they are, the more they are resold and reshared. The more people are on the same servers, the less stable the service, and also often support can follow suit.
So, you can get free, you can get cheap, cheap and you can pay a little more for your IPTV services, people have different levels of expectations and i've tested more systems than most, as it's my job - I have always found andoid/kodi/apps etc problematic/buggy and almost every cheap service tested has had issues with missing channels or stability. It depends on the level of compromise and service you expect.
If you think you can get a premium service with the stability of Sky for 1/50th of the price or free - please enlighten me, as in 5 years odd, i've seen nothing to suggest other than cheap is cheap for a reason.
From what I have seen, most companies require an operational subscription of between €20-€30 a month, to provide what i'd call a stable and decent enough long-term service. I've also seen a lot go off & apps go off too - hence the dislike for Kodi (read cracked Amazon stick, as well, as that' is running Kodi) as nothing but a secondary, choice.
Ultimately many of these online-only companies/resellers selling the same service - work on a high turn over business model, so they base the fact they are cheap, that many join, but the dropoff rates are high, as people get fed up as many service issues & keep switching cheap providers - depends what you want.