Excessive downloads in analytics

Does anyone know how to track where downloads are coming from. All of a sudden 3 episodes ago I am suddenly getting several hundred downloads per day. When I upload a new episode the downloads move to that one, and stop on the previous one. I am concerned it’s a DoS attempt or a rogue bot somewhere.

Any ideas how I can check and/or block - it happened once before about six months ago but not as bad - as per attached screen shot

image

Welcher Podcast Client und welche Länder werden denn angezeigt?

Versions
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Publisher: 3.4.1
Player: 5.4.8
Subscribe: 1.3.7
WordPress: 5.6

Country is US
Source: Feed
Player: Unknown