There seems to be a problem with this font, using current FOP code?
08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 0 Copyright 2013 Google Inc. 08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 1 Noto Color Emoji 08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 2 Regular 08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 3 Noto Color Emoji 08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 4 Noto Color Emoji 08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 5 Version 2.018;GOOG;noto-emoji:20190327:BETA 08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 6 NotoColorEmoji 08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 7 Noto is a trademark of Google Inc. 08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 8 Google, Inc. 08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 9 Google, Inc. 08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 10 Color emoji font using CBDT glyph data. 08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 11 http://www.google.com/get/noto/ 08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 12 http://www.google.com/get/noto/ 08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 13 This Font Software is licensed under the SIL Open Font License, Version 1.1. This Font Software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the SIL Open Font License for the specific language, permissions and limitations governing your use of this Font Software. 08:43:33.554 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 81 - 3 1 1033 14 http://scripts.sil.org/OFL 08:43:33.555 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 415 - 2 cmap tables 08:43:33.555 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 425 - Platform ID: 0 Encoding: 5 08:43:33.555 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 425 - Platform ID: 3 Encoding: 10 08:43:33.555 [main] DEBUG org.apache.fop.fonts.truetype.TTFFile 472 - CMAP format: 12 08:43:33.555 [main] INFO org.apache.fop.fonts.truetype.TTFFile 363 - Dirtab loca not found.