Can i get some help to ID this bird please

Can we sure this isn't just Eastern Olivaceous? I know the primary projection looks short, as does the tail, and the primary tips are not contrasting, but the tertials look dark, more like EOW. There isn't really a pale panel on the wing but lots of pale fringes and I can see pale tips to the folded secondaries, also pointers for EOW. It's hard to assess the length of P1 as the primary coverts don't look complete - long P1 is a good Sykes's feature. The emarginations on the primaries are not particularly pronounced but appear to fall short of the tips of the secondaries - I'm not completely sure. In Sykes's they should fall inside, in EOW level with them. The eyering looks a little pronounced for Sykes's. Dark alula better for EOW?

Can someone else have a look?

Paul, was it repeatedly dipping is tail?

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Looks like a small Iduna warbler. No more photos?