"Once is happenstance, twice is coincidence, three times is enemy action." Maybe it's a coincidence, maybe it's not. I think it's very reasonable to want alternatives in any case.
Russia at this point is largely deindustrialized and rapidly losing its tech know-how. The recent string of failures in space programme is only one (but certainly high profile) manifestation of it.
Even with three failures I would not consider it a trend unless they are related in nature. For the current trend of "basically no failures" to go to "some failures" you'd need a couple dozen failures at minimum.