Twitter image in posts not always showen

Hello @simsim1986,

Thank you for contacting Rank Math support, and sorry for any inconvenience that might have been caused due to that.

Could you please share the affected URL so we can check?

Meanwhile, ensure that the image or featured image you’re using is as close as 1200 x 630 pixels, and the image file format you are using is only between jpeg, gif, or png as per Opengraph Standards:
https://rankmath.com/kb/open-graph-image-not-displaying/#num-4-2-image-dimensions-image-format

Hope that helps.