Anyone has had similar issues ?
The missing candles are usually doji stars.
It happens in many charts and brokers, refresh as Marco suggested.
right, the missing ones are dojis, and as i hovered above them with mouse pointer, the data window shows OHLC data without problem. so the candles exist, but not shown.
BUT, the solution was suggested by @kypa, thanks.
it was a template (with weird colors) issue.