Switching from Manual to Maximize Conversion

Hi, everyone

Two weeks ago I launched the campaign with manual CPC. It converted very well, 33 conversions during this period. Than within a long discussions and debates it was switched to maximize conversion with tCPA. And now the campaign doesn't reach even 1 single impression.

Probably the algorithms required more time or what else can have an impact for previously performing well campaign?

Thanks in advance!

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