Created attachment 410746 [details]
Attachment1

Hi, I'm having a paint issue on Safari 13.1.2. I don't believe this is our code (famous last words). The HTML and CSS is correctly positioning the button and plane icon. However, on first load they are painted in the middle of the screen. When I inspect and change a style value the page repaints and the button and icon paint in the correct page.

I have attached a URL.

https://www.jet2.com/en/low-fare-finder/paphos?dep=BHX,EMA,EDI,GLA,LBA,STN,MAN,NCL,BFS&arr=INN,SZG,VIE,BOJ,DBV,PUY,SPU,ZAD,LCA,PFO,PRG,CPH,EGC,GNB,LRH,LYS,NCE,CDG,BER,CGN,CFU,CHQ,HER,KLX,EFL,KGS,MJT,JMK,PVK,RHO,JTR,JSI,SKG,ZTH,BUD,KEF,NAP,PSA,FCO,TRN,VCE,VRN,MLA,TIV,AMS,KRK,FAO,FNC,ALC,LEI,BCN,FUE,GRO,LPA,IBZ,ACE,PMI,AGP,MAH,RMU,REU,TFS,GVA,AYT,BJV,DLM,ADB,JER&from=2020-10-01&month=true&adults=2&infants=0&duration=7&oneway=false&outboundDepartureTimes=00:00-11:59,12:00-16:59,17:00-23:59&inboundDepartureTimes=03:01-11:59,12:00-16:59,17:00-03:00&filterDuration=7&selectedDate=28-10-2020& 

I have also attached an image of the issue and inspected so you can see the button is correctly placed.